Comparison of copper versus copper-plated penny

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Cut halfs of a US 1957 mint copper wheat penny-- with over 95% copper--compared to a US 2015 mint penny, which is copper-plated zinc.
Cut halfs of a US 1957 mint copper wheat penny-- with over 95% copper--compared to a US 2015 mint penny, which is copper-plated zinc.
Filename: penny_01.jpg
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